磷化氢对硫酸盐还原的影响  

Effect of free phosphine on sulfate reduction.

作　　者：郭夏丽[1] 程小萍[2] 郑平[1] 梅玲玲[1] 

机构地区：[1]浙江大学环境与资源学院环境工程系 [2]湖北职业技术学院护理系,湖北孝感432000

出　　处：《浙江大学学报（农业与生命科学版）》2008年第1期103-108,共6页Journal of Zhejiang University:Agriculture and Life Sciences

基　　金：国家自然科学基金资助项目(50278084)

摘　　要：采用分批试验,以污水处理厂的厌氧活性污泥作为接种物,研究磷化氢对硫酸盐还原菌代谢活性及生长的影响.COD/SO42-为1.0时,较高浓度(500 mL·m-3)磷化氢对以乙酸及葡萄糖为基质的硫酸盐还原均有抑制作用.以乙酸为基质时,添加磷化氢样品与不加磷化氢对照的硫酸盐转化半衰期分别为5.6 d和4.7 d;以葡萄糖为基质时,添加磷化氢样品与不加磷化氢对照的硫酸盐转化半衰期分别为4.7 d和2.9 d.磷化氢对以葡萄糖为基质的硫酸盐还原抑制程度较高.磷化氢对以葡萄糖为基质的硫酸盐转化的半抑制浓度(IC50)为583.8 mL·m-3.较高浓度的磷化氢对硫酸盐还原菌的生长也具有显著的抑制作用,抑制效应随时间的延长及磷化氢浓度的加大而增强.The effects of free phosphine on growth and metabolism of sulfate-reducing bacteria were investigated using batch experiment. The results show that when COD/SO4^2- ratio was 1.0, high phosphine level had an adverse effect on sulfate reduction. The half life of sulfate reduction by acetate in the culture with phosphine and in the control without phosphine was 5.6 d and 4.7 d, respectively, but that of sulfate reduction by glucose was 4.7 d and 2.9 d, respectively. The inhibition of phosphine to sulfate reduction by glucose was more serious than that by acetate. The half inhibitory concentration of phosphine to sulfate reduction was 583.8 mL·m^-3with glucose as substrate. The phosphine had also an inhibitory effect on the growth of sulfate-reducing bacteria at concentrations higher than 500 mL·m^-3 . The inhibition was enhanced when phosphine concentration was increased and incubation time lengthened.

关 键 词：磷化氢 硫酸盐转化 硫酸盐还原菌 抑制作用 

分 类 号：X17[环境科学与工程—环境科学]